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Finding the Fourth Proportional to 18,940.88, 26,149.62 and 16,839.20

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Solution

The fourth proportional to 18,940.88, 26,149.62 and 16,839.20 is: 23,248.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.88 : 26,149.62 = 16,839.20 : x
  2. Step 2: Convert to fraction form
    18,940.88/26,149.62 = 16,839.20/x
  3. Step 3: Cross multiply
    18,940.88x = 26,149.62 × 16,839.20
  4. Step 4: Simplify right side
    18,940.88x = 440,338,550.36
  5. Step 5: Solve for x
    x = 440,338,550.36/18,940.88
  6. Step 6: Final answer
    x = 23,248.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.